Derivative of sin x - MIT OpenCourseWare

formula for the derivative of the function sin x. As before, we begin with the definition of the derivative: d. sin x = lim. dx. Δx→0. Δx. You may remember the following angle sum formula from high school: sin(a + b) = sin(a) cos(b) + sin(b) cos(a) This lets us untangle the … ................
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